Triturating and mixing apparatus



, J. TREGURTHA. Tlit'urating andMixing'Apparatus.

No. 227,395. Patented Mayu, 1880.

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WWNESSEEL N. PETERS4 '1111019.11111 am HER. wA 1 "UNITED 'STATES PATENT Erica JAMES TREGURTHA, OF BOSTON, ASSIGNOR TOOHASE, MERBITT St BLANCHARD, OF SAME PLAGE, AND WALTER N. DOLE, AGENT,

OF LYNN, MASSACHUSETTS.

TRITURATING AND MIXING APPAR'ATUS.

SPECIFICATION forming' part of Letters Patent No. 227,395, dated May 11, 1880.

Application filed February 16, 1880.

To all whom it may concern:

Be it knownl that I, JAMES TREGURTHA, a subject of the Queen of Great Britain, residing in Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Triturating and Mixing Apparatus, of which the following is a specification.

In the preparation of dissolved rubber for any purpose in the arts it is requisite that the solution should be well ground and mixed together, so as to be uniform in character, and if any foreign matter is to be added to it that that should be thoroughly and uniformly disseminated through the mass.

The apparatus hereinafter described is intended for working and triturating dissolved rubber. The solution of rubber in any of its known solvents is placed in a tub of suitable shape, provided with a cover to prevent evaporation, and also with suitable means for removing the solution therefrom when the work of trituration is finished.

Figure l represents avertical section through the center of the tank. Fig. 2 represents a vertical section through the tank and axes of the triturating-rolls. Fig. 3 represents a horizontal section through the mixing-rolls and one of the scrapers, E. Fig. 4 represents a vertical section through the center of the tank and axes of the triturating-rolls, showing one on either side of the central shaft.

Like letters refer to similar parts.

In the drawings, this tub is marked A. Upon a spindle, B, is mounted a toothed cylinder, O, so fixed that it does not revolve when the spindle is turned. At the bottom of the cylinder O is a yoke, D, and at the top is another yoke, D', each of which is adapted to be revolved with the spindle B. On one side of the cylinder, between these two yokes, is mounted another toothed cylinder, F, whose teeth mesh into the cogs of the cylinder C. This cylinder F, upon turning the spindle, revolves between the two yokes by means of the meshing of its teeth with those of the cylinder C. On the other side of the cylinder O, between the two yokes, are mounted inclined through the axes of the two cylinders O and F. These inclined blades, whose forward edges sweep near the tank, serve to gather the solution from the exterior part of the tank and draw it in toward the cylinder C, and thereby cause it to be more elt'ectually and quickly ground and mixed than it otherwise would be.

On the lower yoke, D, at opposite sides, intermediate between the cylinder F and the blades E, are mounted paddles Gr G, whose plane is inclined to a vertical plane passing through the axis of the cylinder G, and also to the horizontal plane of the machine. These blades serve to stir up the mass of the solution from the bottom and to throw it upward. By means of these inclinedblades the exterior of the mass is drawn in toward the center of the machine, and the lower part of the mass is thrown up toward the upper part of the'tank, so that crossing mixing currents are made and the material to be triturated is brought within the influence ofthe toothed cylinders and then ground and mixed.

lf desired, in lieu of two toothed cylinders, there may be three or more toothed cylinders, in which case it would be best to have the center one revolved upon its own axis, and thereby move the others lying adjacent upon fixed axes to it, while the blades E and G would be fastened to yokes or hubs and compelled to revolve around and beneath the cylinders, drawing and throwing the material upon the rollers from the exterior and from the bottom of the tank.

In using this machine, after the gum or material of any sort has been placed under the influence of its solvent in the closed tank, this machine is actuated, and the solvent and thing to be dissolved are thoroughly ground together, any other material being added from time to time, as may be desired, and ground in with the menstruum. A

The use of a covered tank is essential in employing solvents of rubber and gutta-percha, 2. The combination, in a covered tank, A, of and meshing toothed cylinders seem to Work the toothed triturating-rollers G F and the better than any other triturators. blades G G', exterior to the same and inclined 15 I claim as my invention and desire to se# to thel plane of the bottom of the tank, sub- 5 cure by Letters Patent ofthe United Statesstantially as and for the purposes described.

1. The combination, in a covered tank, A, of meshing toothed triturating-ollers C F, With JAMES TREGURTHA. revolving blades E, arranged ata tangent to the surface of one of said rollers, and inclined Witnesses:

IO across a planepassing through the axes of said F. F. RAYMOND, 2d, rollers, substantially as and for the purposes M. W. SAWYER. described. 

